Photographic shutter



(N0 Model.)

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Patented Deo. 29, 1896.

INVENTOR /M A TORNEY www 1 e 50N. Lmr/I UNITED STATES PATENT OFFICE.

ALFRED E. YOUNGER, OF HUN'TINGTON, NEIV YORK.

PHOTOGRAPHIC SHUTTER.

SPECIFICATION forming part of Letters Patent No. 573,953, dated December29, 1896. Application filed July 14, 1896. Serial No. 599,076. (Nomodel.)

T0 all whom] t muy concern:

Be it known that I, ALFRED E. YOUNGEE, a citizen of the United States,and a resideni of Huntington, in the county of Sulfolk and State of NewYork, haveinvented certain new and useful Improvements in PhotographicShutters, of which the following is a specilication.

My invention relates to animprovementin shutters for photographiccameras, the construction and operation of which, owing to the few partsinvolved, their simplicity and durability, render the sh utterspeculiarly valuable for all photographic apparatus, and, owing to thecompactness of the parts and the fact that they can be made of verysmall size, yet equally operative with larger parts, makes the shutterespecially useful in connection with pocket-cam eras or others of smallsize.

The invention consists in the peculiar construction of the parts, theirarrangement, and cooperative operation, as hereinafter described.

In the drawings hereof I have not shown the camera; merely the shutterand its supporting board or plate. It may be attached to a camera in anysuitable manner.

Referring to the drawings, Figure l illustrates an elevation of theshutter as seen from the front, the parts being in their normalposition. Fig. 2 illustrates an elevation, the parts being in theposition in which they are under tension readyfor an exposure. Fig. 3illustrates an elevation of the parts in the position in which anexposure is about to be made. Fig. et illustrates a vertical section ofthe parts on the line l l of Fig. l. Fig. 5 illustrates an elevation ofthe parts in the position theyassume for making a time exposure. Fig. 6illustrates an elevation of the solid shut ter. Fig. 7 illustrates anelevation of the eX- posure-shutter.

A is a base for the support of the different parts of the shutter. B isa finder provided with the usual lens O and an exposure-opening D. Theseparts maybe made in any desired manner.

E is the lens of the camera proper. F is the exposure-opening. Gis thesolid shutter. H is the exposure-shutter. These parts, separated fromothers, are shown, respectively, in

Figs. 0 and 7. Both of these shutters are pivoted at I tothe base-board.The solid shutter G is made in substantially the shape shown in Fig. 6,and has a laterally-extending thumbpiece or lever J, which projectsthrough the side of the camera, or is otherwise made accessible from theexterior. It is also provided with two forwardly-extending lugs K and Land with a forwardly-extending and curved deiiecting-iinger M. (see Fig.7) has a forwardly-extending lug N, an exposure-aperture O, and twodetents or catches P P.

Q, is a spring which is fastened at the lefthand end to a pin R, set inthe base-board, and at its other end attached to the lug L on the solidshutter G, and S is another lighter spring which is fastened at one endto the lug K on the solid shutter G and at the other end to the lug N onthe .exposure-shutter H.

T is a guide and guard for the shutters, beneath which they pass fromside to side freely and without friction, although they are sustainedand held in position by it.

U is -a latch pivoted at U to the base-board and having anupwardly-extending finger V and on its free end a roller W, supportedupon a pin NV, fastened to or made part of the latch U. Any equivalentfor these parts may be employed.

a is a vertically-sliding rod which may be set into a groove in thebase-board, as shown, and supported therein by a plate Z2 or any othersuitable device. It preferably has a thumb-piece or handle c on itsupper end, and is provided with a tooth or catch CZ at or near its lowerend.

The latch U is provided with a spring e, which normally throws it upwardto the limit of its movement, which is determined by av wide staple f.(See particularly Fig. 4.)

The operation of the apparatus to make an instantaneous exposure is asfollows: After the subject has been properly located and centered on theplate the operator with his thumb depresses the lever J, which projectslaterally beyond the camera or is otherwise made accessible, and thelever is depressed as far as it will go, whereupon the parts assume theposition shown in Fig. 2; that is to say, the impingement of the lug Non the exposure-shutter II against the side of the solid TheeXposure-shutterII IDO shutter G carries both shutters to the left,putting the spring Q under tension, as shown in Fig. 2, and during thetransit ot the parts the finger M on the solid shutter G depresses thelatch U, and d nring the transit the solid shutter G covers theexposure-opening O in the exposure-sluitter, so that no light can enter.The operator holds the lever Ain a depressed position until the exposureis to be made, whereupon he lets go ot' it, either suddenly or byallowing it to rise, as he prefers, whereupon the parts move into theposition shown in Fig. B--that is to say, the solid shutter G, beingactuated by the stronger spring Q, passes to the left, but theexposure-shutt-er il is held by reason of the engagement of its catch l"against the linger 'V ol' the latch U, whereby it (the exposure-shutter)is detained, and as the solid shutter moves underthe action of thespring Q still farther to the left the lighter spring S is put undergreater and greater tension, and as the linger M on the solid shutterpasses in contact with the roller \V upon the free end of the latch Uthat latch is depressed until just at the time that the solid shutterhas passed to the lettout ot register with the exposure-aperture in thecamera. rlhen the engagement between the Alinger Y on the latch and thecatch l) on the exposure-shutter is broken, and therecontact with thetoothd, whereupon its course is arrested, and in this position theexposureorirfice O in the shutter and the exposureopening F in thebase-board coincide, so that a time exposure ot' such duration asdesired may be had, and at its expiration the rod c is depressed bypressure on its upper end c, whereupon the tooth d is disengaged :tromthe tooth ll and the exposure-shutter then completes its movement to thelejlft and light is excluded.

rlhe simplicity,compaetness, and du rability ot' my shutter will beparticularly noticed, and it will be obvious to those who are tamiliarwith this art that various modilieations may be made in the details otconstruction ol the parts without departing Yfrom the essentials et' myinvention. l, theret'ore, d o not limit mysoll. to such details.

I claim-- l. The combination of a solid shutter pro vided with a leverand a spring to actual; 1, a perforated shutter provided with detent,"or catches, a spriiig-actuated latch to engage the apertured shutter,ainger on tho solid shutter to release it, a sliding tooth adapted uponthe exposure-shutter ll, under the acexeeptingtlmt the rod u, whichhaspreviously i heen depressed, is now pulled upwardly by its head orthumbpiece c, which is accessible from the exterior ot the camera, sothat the catch or tooth` d at or near its lower end is brought upwardlyinto the path of the catch,

l on the exposure-shutter, and when the shutters are moved to the right,as above eX- plained, this catch l tilts upwardly, as it passes over thetooth d on the rod, and thereafter by reason ol the elasticity ol theexposnre-shutterll drops back. again into the same plane as the tooth d.Consequently when the parts are released :from their position, as shownin Fig. El, the exposure-shutter ll, under the action ot its spring S,moves to the left so Far only as lo bring its catch l" into to engagethe perforated shutter, anda springl connect-ing the shutters, pnt undertension bythe movement oli' the solid shutter, t'or the purposes setforth,

2. The combii'iation olf a solid shutler provided with a lever operatedfrom the exterior ot' the camera, a spring which actuates said shutterput under `tension by movement olf the lever, an apertured shutterconnected to the solid shutter by a spring, said spring being putundertension by movement ol' the solid shutter, a catch to retain `theexposureshutter against movement in one direction, and a linger on thesolid shutter which aeluates said catch, for the purposes set lorth.

3. rlhe conllnnation of a Isolid shutter, an

'apertured exposure-shutter, both pivoted upon the same center, a leveri'or acti'niting said shutters Vin one direction, springs `l'oractuating them in the opposite direction, a spring-coiitrolled latch,and a slidingI latch, both adapted to detain the exposure-shutteragainst movement in one direction, and a linger on the solid shutterwhich .releases said lirst-named latch, for the purposes set vforth.Signed at Huntington, in the county ol.' Sultoll; and State oli' NewYork, this Sith day Ot' lluly, A. Vl). lSOo'.

A Llil-tll lf) lil. YOI TN ("fll il. lYitnesses:

DoUcLi-tss Continu', .Unes M. Binisu.

